package com.css.zfzx.sjcj.common.utils;


import org.springframework.beans.BeanUtils;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import java.util.HashSet;
import java.util.Set;

/**
 * @author leon
 * @Title:
 * @Description:
 * @date 2020/6/22 16:53
 */
public class BeanUtil implements ApplicationContextAware {

    /**
     * 当前IOC
     */
    private static ApplicationContext applicationContext;

    /**
     * * 设置当前上下文环境，此方法由spring自动装配
     */
    @Override
    public void setApplicationContext(ApplicationContext arg0)
            throws BeansException {
        applicationContext = arg0;
    }

    /**
     * 从当前IOC获取bean
     *
     * @param id bean的id
     * @return
     */
    public static Object getObject(String id) {
        Object object = null;
        object = applicationContext.getBean(id);
        return object;
    }

    public static String[] getEmptyPropertyNames(Object source) {
        final BeanWrapper src = new BeanWrapperImpl(source);
        java.beans.PropertyDescriptor[] pds = src.getPropertyDescriptors();

        Set<String> emptyNames = new HashSet<String>();
        for (java.beans.PropertyDescriptor pd : pds) {
            Object srcValue = src.getPropertyValue(pd.getName());
            if (srcValue == null || "".equals(srcValue))
                emptyNames.add(pd.getName());
        }
        String[] result = new String[emptyNames.size()];
        return emptyNames.toArray(result);
    }

    public static String[] getNullPropertyNames(Object source) {
        final BeanWrapper src = new BeanWrapperImpl(source);
        java.beans.PropertyDescriptor[] pds = src.getPropertyDescriptors();

        Set<String> emptyNames = new HashSet<String>();
        for (java.beans.PropertyDescriptor pd : pds) {
            Object srcValue = src.getPropertyValue(pd.getName());
            if (srcValue == null)
                emptyNames.add(pd.getName());
        }
        String[] result = new String[emptyNames.size()];
        return emptyNames.toArray(result);
    }

    /**
     * 拷贝源数据到目的数据，只忽略NULL值
     *
     * @param src
     * @param target
     */
    public static void copyPropertiesIgnoreNull(Object src, Object target) {
        BeanUtils.copyProperties(src, target, getNullPropertyNames(src));
    }

    /**
     * 拷贝源数据到目的数据，忽略NULL值和空字符串
     *
     * @param src
     * @param target
     */
    public static void copyPropertiesIgnoreEmpty(Object src, Object target) {
        BeanUtils.copyProperties(src, target, getEmptyPropertyNames(src));
    }

}